李丙岩;王玉;朱昀;王鑫;许文静;苟文隆;袁雪凌;彭江;卢世璧;

• 1:解放军总医院骨科

摘要(Abstract)：

[目的]建立制备脐带Wharton胶干细胞细胞外基质(extracellular matrix,ECM)的方法并对其生物相容性进行观察。[方法]无菌条件下收集人脐带组织,采用酶消化法分离培养脐带干细胞,使用普通培养基培养7 d后,在原培养基中添加抗坏血酸,再连续培养8 d;加入含有0.5%Triton X-100和20 mM NH 4OH的PBS溶液进行脱细胞处理后,用Hoechst 33258染色观察其DNA残留,采用扫描电镜对其微结构进行观察,通过天狼星红、甲苯胺蓝、番红花O组织学染色和I型胶原、II型胶原、纤维粘连蛋白及层粘连蛋白免疫荧光染色观察微载体的主要成分;将异体脐带干细胞种植在无细胞核DNA残留的ECM上,通过MTT法观察脐带干细胞的增殖生长情况。[结果]通过本实验方法得到的天然脱细胞脐带干细胞ECM,表面无细胞及DNA残留,整体表面有细胞陷窝形成,基质紧密连接。Hoechst 33258荧光染色阴性;天狼星红、甲苯胺蓝和番红花O组织学染色阳性;I型胶原、II型胶原、纤维粘连蛋白和层粘连蛋白免疫荧光染色阳性;在MTT检测细胞增殖中,种植于该ECM上的异体脐带干细胞组的OD值高于单纯平面培养组(P<0.05)。[结论]此次实验所得的脱细胞脐带干细胞外基质具有良好的生物相容性,能够为组织工程提供高质量的种子细胞,有望成为组织工程种子细胞的新型培养载体。

关键词(KeyWords)： 干细胞;细胞外基质;生物相容性;组织工程

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(编号:31240048);; 全军十二五重点项目(编号:BWS11J025)

作者(Author): 李丙岩;王玉;朱昀;王鑫;许文静;苟文隆;袁雪凌;彭江;卢世璧;

Email:

DOI:

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